Mystery of the Dying Clocks

UPDATE: Four clocks!  The fourth one was a brown clock (from the family room), which I used between the Roman clock and the living room clock.  It also stopped working.

PLUS new theory:  My room is near the (relatively new) roof antenna, maybe that has something to do with it?

I want a new wall clock badly, but I'm afraid to get one.  You see, three wall clocks have died in my room.  In a row.

Years and years ago, I had a blue flower-shaped clock.  The face cracked when I accidentally dropped it.  It still worked for a long while, but I ended up getting rid of it and adopting a hand-me-down from my sister.  This was a purple clock.

The purple clock lived happily for a year or more on my wall, until one day it acted very strangely, sort of ticking back and forth in one place.  I replaced the battery, and it was either then or a battery replacement(s) later that it stopped working altogether.  Bye-bye purple clock.

So I bought a new clock with Roman numerals--nothing fancy, but a little more expensive than the purple clock. Roman clock stopped working soon afterwards (probably within 6-8 months).  Replaced the battery, to no avail.  "Cheap clock, huh?" thought I.  "Well, Mom and Dad are getting rid of the living room clock, so that's bound to work."

We have had said living room clock for EONS and MILLENNIA.  It's nothing fancy or expensive, either, but it has lasted forever.  For sentimental reasons, I love this wall clock.  Of course, in my room, its lifespan was comparable to that of its predecessor.  Replaced the battery, to no avail (the batteries, I ought to mention, are the same plain old batteries that work fine in every other situation).

I'm seriously freaked out now. 

I have two theories, of sorts (neither of which, however, explains the longevity of the flower-shaped clock).  Firstly: the wall clocks' location has always been within a yard of my smoke detector.  Could it be that the smoke detector's radiation--however small--is actually powerful enough to destroy the mechanisms in cheap wall clocks?  I thoroughly examined the relative locations of the smoke detectors and wall clocks in other rooms of the house, and my room is the only one where the two things are somewhat close to each other.

Even this theory falls flat.  My smoke detector is perfectly normal, and smoke detectors' radiation is essentially harmless to humans.  Besides, the flower-shaped clock lived just fine in the same location in my room, for years and years.   

My second theory is that wireless internet has ruined the mechanisms.  However, this seems ridiculous, since other people have wall clocks and wi-fi, too, and they apparently don't suffer from this bizarre malfunction.

Right now, I just have a framed picture of HMS Victory where the Clocks used to be.  I don't expect to wake up to a shower of shattered glass, but anything could happen, I guess.

Has this phenomenon, or something similar, ever happened to you?